Toxin

A)to produce and give off a substance
B)a poison produced by an organism
C)a juvenile form of an animal
D)a worm-like amphibian that burrows in the soil
E)a change in physical form and structure due to maturity

B) a poison produced by an organism

Bulbous

A)made of cartilage, which is a strong, elastic connective tissue
B)an organ for breathing underwater, consisting of membranes through which oxygen can pass
C)a deep sea fish with a skeleton of cartilage
D)a fin that is a fish's tail
E)rounded, like something swollen

E) rounded, like something swollen

The correct answer is B) a poison produced by an organism.

To find the answer, you can try looking it up in a dictionary or conducting a quick internet search. You can search for the term "toxin definition" to get a clear definition of what a toxin is.